On this page you can find some utitlities
But you need to download and run one with name FixEXE

http://www.nod32.com.br/cleanners/

By the way you may be will need to register some of windows dlls agane
If you will get some errors about missing dlls.
But first use "sfc /scannow" to get them back.
So I think that you can try this
My simple "massive" Dll fixer
http://mrbabis.narod.ru/
This will register/reregister some dll and ocx files in the %windir%\system32